Gun barrel seating device



y 1966 R. KORZENIEWSKI 3,252,237

GUN BARREL SEATING DEVICE Filed Sept. 21, 1964 INVENTOR.

ROBERT KORZENIEWSKI BY q 9 22mg ATTORNEYS pivotal movement thereof.

United States Patent 3,252,237 GUN BARREL SEATING DEVICE RobertKorzeniewski, 59800 North Ave., New Haven, Mich. Filed Sept. 21, 1964,Ser. No. 397,877 14 Claims. (CI. 42-75) The invention relates to firearms and refers more specifically to a lock up ramp which term definesan abutment adapted to be adjustably secured to an automatic pistol orthe like against which the rear end of the pistol barrel may be lockedin a limiting upper position for accurately positioning the rear end ofthe barrel of the pistol.

Production fire arms have rather wide tolerances so that they mayoperate under adverse conditions without jamming or misfiring. Thesewide tolerances are, however, not acceptable for match shooting. Thefire arms must be made more accurate for match shooting by proceduresincluded in the general term accurizing.

The accurizing of automatic pistols has in the past included reducingtolerances in the barrel supporting mechanism as much as possiblebyadding material to the mating parts thereof. Such accurizin-gwhileacceptable does not do a complete job with fire arms wherein thebarrel is pivotally supported at the rear end. With such structure, theelevation of the rear end of the barrel may be slightly varied atbattery position due to variation in This is particularly undesirablesince shooting accuracy depends upon the exact return of the barrel tothe same position after each firing of the pistol.

In addition, when the fire arm is accurized by adding material tomembers thereof to reduce loose movement between the members thereof,sludge which collects in fire arms on use may cause misalignment of thebarrel since there are substantially reduced clearances in which sludgemay rest with accurized fire arms. Also, with the prior method of addingmaterial to close tolerances in accurizing fire arms no provision ismade for wear of the fire arm in use so that the fire arms must beaccurized periodically if they are to be maintained in top condition.

Another fault of prior fire arms having barrels in which the rear enddoes not return to an exact position with respect to the firing pin orin which the position to which the rear end of the barrel returns is notexactly centered with respect to the firing pin, is that the ignition ofa shell by the firing pin may not be uniform so that accuracy is againaffected adversely.

It is, therefore, one of the purposes of the present invention toprovide improved accurizing structure for fire arms.

Another object is to provide improved structure for returning the rearend of an automatic pistol barrel to an exact predetermined el'evationafter each firing thereof.

Another object is to provide improved means for returning the rear endof an automatic pistol barrel to an exact predetermined horizontalposition after each firing thereof.

Another object is to provide a lock up ramp for the rear end of thebarrel of a fire arm which is adjustable to vary the vertical positionof the rear end of the barrel when in battery position.

Another object is to provide a lock up ramp for the rear end of thebarrel of a fire arm which may be adjusted in height to center the rearend of the barrel in battery position with respect to the fire armfiring pin.

Another object is to provide a lock up ramp for the rear end of thebarrel of a fire arm including structure for attaching the lock up rampto the barrel which is locked in position against loosening byvibration.

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Another object is to provide a lock up ramp for the rear end of thebarrel of a fire arm which provides three point suspension for thebarrel in battery position to accurately return the barrel to an exactvertical and horizontal position after each firing of the fire arm.

Another object is to provide a lock up ramp for the rear end of thebarrel of a fire arm constructed to provide structure for collectingsludge which formson firing of the fire arm.

Another object is to provide a lock up ramp for a pistol including meansfor supporting the read end of the pistol barrel in a position toprevent complete locking of the lugs of the barrel in the slide grooveswhereby the barrel unlocks easier in use.

Another object is to provide lock up ramp structure for the read end ofthe barrel of a fire arm which is simple in construction, economical tomanufacture and efiicient in use.

Other objects and features of the invention will become apparent as thedescription proceeds, especially when taken in conjunction with theaccompanying draw-- ings, illustrating a preferred embodiment of theinvention, wherein:

FIGURE 1 is a partly broken away partial elevation view of an automaticpistol including a combined barrel lock up ramp and rear sightconstructed in accordance with the invention.

FIGURE 2 is a cross section view of the pistol portion and lock up rampillustrated in FIGURE 1 taken substantially on the line 2- 2 of FIGURE1.'

FIGURE 3 is an elevation view of the combined barrel lock up ramp andsight illustrated in FIGURE 1.

FIGURE 4 is a crosssection view similar to that of FIGURE 2 andillustrating a modified barrel lock up ramp.

FIGURE 5 is :a partly broken away partial elevation view of an automaticpistol including a barrel lock up slug constructed in accordance withthe invention.

FIGURE 6 is a cross section view of the pistol portion and barrel lockup slug illustrated in FIGURE 5 taken substantially on the line 6--6 inFIGURE 5.

FIGURE 7 is a top elevation of the pistol portion and barrel lock upslug illustrated in FIGURE 5.

With particular reference to the figures of the drawing one embodimentof the present invention will now be considered in detail.

As shown best in FIGURE 1 in accordance with the invention, theautomatic pistol I10, only a part of which is shown, is provided with acombination barrel lock up ramp and rear sight 12. In operation the lockup ramp and rear sight 12 provides a vertical and horizontal limitingabutment for the rear end 14 of the barrel 16 in the battery position.thereof as shown in FIGURE 1.

More specifically, the pistol 10 may be the Colt automatic pistolmanufactured by Colts Patent Fire Arm Manufacturing Co. of Hartford,Connecticut, similar to that shown in United States Patent No. 1,563,675and includes the slide 18 having the front sight 20 thereon,

'the locking slots 22 on the interior thereof, and the opening 24extending therethrough through which the firing pin (not shown) isinserted.

The barrel 16 includes the locking lugs 26 thereon engageable in theslots 22 in the battery position of the barrel 16. Barrel 16 furtherincludes the barrel link 28 pivoted thereto by the barrel link pin 30.

In the usual operation of the automatic pistol, the slide 18 is movedrelative to the barrel from a rearward position forward to place theslide and barrel in the battery position shown in FIGURE 1. A barrelbushing 11 carried by the slide 18 establishes a single forward point ofreference for the barrel 16.

During the movement of the slide toward the battery position the rearend 14 of the barrel 16 is in a lowered position so that the lugs 26 arepositioned below the slots 22. As the battery position is reached therear end 14 of the barrel 16 is pivoted upward through the barrel link28 and pin 30 to insert the locking lugs 26 into the slots 22.

In the usual pistol structure the vertical position of the rear end 14of the barrel 16 in battery position is determined by the position ofthe barrel link 28 which is pivoted on a slide stop pin (not shown). Thehorizontal position of the rear end 14 of the barrel 16 is determined bythe movement of the hood 32 of the barrel 16 in a slot 34 in the slide18. Thus the accuracy of the positioning of the rear end 14 of thebarrel 16 in the operation of the usual pistol structure depends on themanufacturing tolerances of the slide stop pin, barrel link 28, barrellink pin 30 and the slot 34. With such structure the return of the rearend 14 of the barrel 16 to an exact predetermined position after eachfiring of the pistol is difiicult to obtain.

Therefore, in accordance with the invention, the top surface 36 of theend 38 of the slide 18 is machined to provide a bearing surface for thecombination lock up ramp and rear sight 12. The lock up ramp and rearsight 12 is then secured to slide 18 to provide two reference locationsfor the rear end 14 of the barrel 16 whereby the barrel is in threepoint suspension in the battery position.

The lock up ramp and rear sight 12 includes the generally U-shapedmember 40 having the openings 42 extending therethrough through whichscrews 44 extend into the top :of the slide 18 to screw the lock up ramp12 to the slide 18.

A rear sight 46 is secured in the end 48 of the U-shaped member 40 byconvenient means such as pivot pin 50. Rear sight 46 is verticallyadjustable about the pivot pin 50 by means of the screw 52.

The lock up ramp 12 is provided with an axially extending recess 54 inthe end 56 thereof as shown best in FIGURE 2. The end 56 of the U-shapedmember 40 and the recess 54 extend over the hood 32 at the rear end 14of the barrel 16 and provide a vertical abutment therefor so that eachtime the barrel 16 is brought to the battery position it is stopped inan exact vertical location. With the end 14 of barrel 16 in the exactvertical position the lugs 26 are slightly above the bottom of the slots22 provided therefor. The barrel 16 is thus more easily unlocked thannormally is the case when the lugs are seated fully in the slots 22.

As shown best in FIGURE 2, the recess 54 is in the form of a circularsegment which segment has a diameter slightly less than the diameter ofthe apron 32 on the end 14 of barrel 16. Thus two reference points 55and 57 are provided for the rear end 14 of the gun barrel 16 which inconjunction with the single reference point for the front end of thebarrel 16 provided by the bushing 11 provides exact three pointsuspension for the barrel 16.

The two reference points for the rear end 14 of the barrel 16 alsoprovide an exact horizontal position for the rear end 14 of the barrel16. With the bushing 11, the barrel 16 is thus located exactlyhorizontally as well as vertically on each return to the batteryposition thereof.

Again as shown best in FIGURE 2 a longitudinally extending groove 58 isprovided in the recess 54. The groove 58 serves to collect sludge formedin the pistol 10 on operation thereof which might otherwise tend toprevent the rear end 14 of barrel 16 from seating in the recess 54 inthe exact position after each firing of the pistol 10.

The U-shaped member 40 of the combined lock up ramp and rear sight 12 isfurther provided with a tapered lower surface 60 to permit some pivotingof the member 40 upon adjustment of the screws 44 to vary the height ofthe recess 54 and thus the vertical position of the end 4; 14 of barrel16. The end 14 of barrel 16 may thus be accurately centered with thefiring pin opening 24 to provide uniform ammunition ignition for exactlyrepeatable shots.

The lock up ramp screws 44 are held in adjusted position by the plate 62positioned over the top thereof and held in place by means of pin 64.Thus there is no tendency for the screws 44 to become loose due tovibration on firing of the pistol 10.

A modification 66 of the lock up ramp and rear gun sight 12 isillustrated in FIGURE 4. In the modified lock up ramp and rear gun sight66 the recess 68 is provided with an inverted V-shaped transverse crosssection to again provide two vertical reference points for the rear endof gun barrel 70. The V-shaped recess 68 provides room at the apex forcollection of sludge therein seating of the barrel 70 in the recess 68of the lock up ramp and rear sight 66 is thus assured.

The modified lock up ramp or slug 72 illustrated in FIGURES 5 through 7is provided in conjunction with a separate rear sight 7 4. With thestructure illustrated in FIGURES 5 through 7 a slot 75 best shown inFIGURE 7 is machined in the slide 76 of a pistol 78 and the slug 72having the arcuate recess 80 in the end 82 thereof, best shown in FIGURE6, is secured in the slot 75 by adjusting screws 84.

The slug 82 is provided with the pivot portion 86 extending transverselycentrally of the bottom thereof which in conjunction with the screws 84permits vertical adjustment of the recess 80 to vary the verticalabutment provided for the hood 88 of gun barrel 90.

While one embodiment and modifications of the present invention havebeen considered in detail, it will be understood that other embodimentsand modifications are contemplated by the inventor. It is the intentionto include all modifications and embodiments of the invention as aredefined in the appended claims within the scope of the invention.

What I claim as my invention is:

1. An automatic pistol including a slide and a barrel having a rear endand means for moving the barrel upwardly into the battery positionthereof, a combination lock up ramp and rear sight secured to the top ofthe slide over the rear end of the barrel in the battery osition thereofproviding an abutment to exactly position the rear end of the barrel inthe battery position.

2. Structure as set forth in claim 1 wherein the lock up ramp isprovided with a recess in the end thereof ex tending over the rear endof the gun barrel in the battery position into which a portion of thegun barrel extends to provide two point suspension for the rear end ofthe gun barrel.

3. Structure as set forth in claim 2 wherein the lock up ramp furtherincludes a groove in the recess in the end thereof for the collection ofsludge on operation of the pistol.

4. Structure as set forth in claim 3 wherein means are provided foradjusting the abutment vertically to exactly position the rear end ofthe gun barrel in the battery position and for securing the lock up rampin an adjusted position.

5. Structure as set forth in claim 4 and further including a rear gunsight secured to the other end of the lock up ramp.

6. In a fire arm, a barrel, a lock up ramp abutment engageable with theend of said barrel in the battery position thereof for providing apredetermined position for the end of said barrel each time it isreturned to the battery position and means for vertically adjusting thelock up ramp abutment to center the end of the barrel in the batteryposition.

7. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position and a lock up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position having a recess in the portion thereof over therear end of the pistol gun barrel in the battery position, the recesshaving a transverse cross section in the form of a circular segmenthaving a radius slightly less than that of the rear end of the barrel toprovide two separate reference points for the rear end of the gun barrelin the battery position.

8. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position and a lock up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position having a recess in the portion thereof over therear end of the pistol gun barrel in the battery position, the recesshaving a transverse cross section in the form of an inverted V toprovide two separate reference points for the rear end of the gun barrelin the battery position.

9. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position and a lock up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position having a recess in the portion thereof extendingover the rear end of the barrel in the battery position to provide twoseparate reference points and a groove within the recess extendinglongitudinally of the barrel for collecting sludge to preventinterference thereof with the abutment of the rear end of the barrelwith the lock up ramp abutment.

10. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position, a lock up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position and including means for adjusting the verticalposition of the portion of the lock up ramp abutment extending over therear end of the barrel in the battery position thereof to exactly centerthe rear end of the gun barrel.

11. Structure as set forth in claim 10 wherein the means for adjustingthe vertical position of the lock up ramp abutment comprises a taperedlower surface on the lock up ramp abutment and adjusting screwsextending through the tapered surface and into the pistol.

12. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position, a lock up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position having a central pivot portion on the lower surfacethereof extending transversely of the lock up ramp abutment and anadjusting screw at at least one end of the lock up ramp extendingthrough the lower surface thereof and into the pistol.

13. An automatic pistol or the like including a gun barrel and a bushingfor providing a single reference point for the front end of the gunbarrel and lugs adjacent the rear end of the gun barrel for locking thegun barrel in the battery position, a look up ramp comprising anabutment member secured to the pistol over the rear end of the pistolgun barrel in the battery position for providing an abutment againstwhich the rear end of the gun barrel is urged when the gun barrel is inthe battery position, means for securing the lock up ramp to the pistoland means secured to the lock up ramp for securing the means forsecuring the ramp to the pistol in a predetermined position.

14. Structure as set forth in claim 13 wherein the means for securingthe lock up ramp to the pistol comprises a plurality o-f screws set inthe lock up ramp and extending through the lower surface thereof intothe pistol and the means for securing the means for securing the ramp tothe pistol comprises a locking plate secured in the lock up ramp overthe screws.

References Cited by the Examiner UNITED STATES PATENTS 956,431 4/1910Schrneisser 42-754 X 1,563,675 12/1925 Tansley 89-196 X 2,324,775 7/1943Hentschel 42l6.2 X 2,632,272 3/1953 Holik 42-75 2,776,602 1/1957Sturtevant 89-196 2,846,925 8/1958 Norman 89-196 X 2,975,680 3/1961Wilson 89-196 3,110,223 11/1963 Schlappich 89-196 BENJAMIN A. BORCHELT,Primary Examiner.

SAMUEL FEINBERG, Examiner.

6. IN A FIRE ARM, A BARREL,A LOCK UP RAMP ABUTMENT ENGAGEABLE WITH THEEND OF SAID BARREL IN THE BATTERY POSITION THEREOF FOR PROVIDING APREDETERMINED POSITION FOR THE END OF SAID BARREL EACH TIME IT ISRETURNED TO THE BATTERY POSITION AND MEANS FOR VERTICALLY ADJUSTING THELOCK UP RAMP ABUTMENT TO CENTER THE END OF THE BARREL IN THE BATTERYPOSITION.